US4596446B1 - Liquid crystal devices with particular cholesteric pitch-cell thickness ratio - Google Patents

Liquid crystal devices with particular cholesteric pitch-cell thickness ratio Download PDF

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Publication number
US4596446B1
US4596446B1 US50517683A US4596446B1 US 4596446 B1 US4596446 B1 US 4596446B1 US 50517683 A US50517683 A US 50517683A US 4596446 B1 US4596446 B1 US 4596446B1
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Prior art keywords
liquid crystal
thickness ratio
cell thickness
crystal devices
cholesteric pitch
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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Colin M Waters
Edward P Raynes
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Qinetiq Ltd
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UK Secretary of State for Defence
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Application filed by UK Secretary of State for Defence filed Critical UK Secretary of State for Defence
Priority to US06505176 priority Critical patent/US4596446B2/en
Assigned to SECRETARY OF STATE FOR HER DEFENCE IN HER MAJESTY'S GOVERNMENT OF THE UNITED KINGDOM OF GREAT BRITAIN AND NORTHERN IRELAND reassignment SECRETARY OF STATE FOR HER DEFENCE IN HER MAJESTY'S GOVERNMENT OF THE UNITED KINGDOM OF GREAT BRITAIN AND NORTHERN IRELAND ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: RAYNES, EDWARD P., WATERS, COLIN M.
Publication of US4596446A publication Critical patent/US4596446A/en
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Publication of US4596446B1 publication Critical patent/US4596446B1/en
Publication of US4596446B2 publication Critical patent/US4596446B2/en
Assigned to QINETIQ LIMITED reassignment QINETIQ LIMITED ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SECRETARY OF STATE FOR DEFENCE, THE
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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/137—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering
    • G02F1/13725—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering based on guest-host interaction
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1347—Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or cells
    • G02F1/13475—Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or cells in which at least one liquid crystal cell or layer is doped with a pleochroic dye, e.g. GH-LC cell
US06505176 1982-06-29 1983-06-17 Liquid crystal devices with particular cholestric pitch-cell thickness ratio Expired - Lifetime US4596446B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US06505176 US4596446B2 (en) 1982-06-29 1983-06-17 Liquid crystal devices with particular cholestric pitch-cell thickness ratio

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB8218821 1982-06-29
GB8218821 1982-06-29
US06505176 US4596446B2 (en) 1982-06-29 1983-06-17 Liquid crystal devices with particular cholestric pitch-cell thickness ratio

Publications (3)

Publication Number Publication Date
US4596446A US4596446A (en) 1986-06-24
US4596446B1 true US4596446B1 (en) 1994-04-12
US4596446B2 US4596446B2 (en) 1997-03-18

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US06505176 Expired - Lifetime US4596446B2 (en) 1982-06-29 1983-06-17 Liquid crystal devices with particular cholestric pitch-cell thickness ratio

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Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4653865A (en) * 1985-04-05 1987-03-31 Hitachi, Ltd. Liquid crystal display device
US4664482A (en) * 1985-03-15 1987-05-12 Hitachi, Ltd. Liquid crystal display device having a chiral additive and angularly displaced polarizers
US4722594A (en) * 1984-11-14 1988-02-02 Stc Plc Two-dimensional optical information processing apparatus
US4729638A (en) * 1984-08-01 1988-03-08 Sharp Kabushiki Kaisha Liquid crystal-type nonglare mirror
US4779958A (en) * 1986-06-28 1988-10-25 Kabushiki Kaisha Toshiba Liquid crystal device having different natural and induced twists
US4786147A (en) * 1984-07-26 1988-11-22 Commissariat A L'energie Atomique Nematic liquid cell weakly doped by a chiral solute and of the type having electrically controlled birefringence
US4902105A (en) * 1984-09-19 1990-02-20 U.S. Philips Corporation Liquid crystal display device
US4909605A (en) * 1986-09-12 1990-03-20 Konishiroku Photo Industry Co., Ltd. Liquid crystal display device
US4909603A (en) * 1987-03-14 1990-03-20 Sharp Kabushiki Kaisha Liquid crystal display element
US4941737A (en) * 1987-10-07 1990-07-17 Sharp Kabushiki Kaisha Liquid-crystal display device using twisted nematic liquid crystal molecules
US5004324A (en) * 1986-09-12 1991-04-02 Hoffmann-La Roche Inc. Liquid crystal display
US5463482A (en) * 1993-10-18 1995-10-31 Raychem Corporation Liquid crystal composite with droplets of plural chiral nematic materials with different reflection bands
US5579142A (en) * 1994-10-14 1996-11-26 Sharp Kabushiki Kaisha Liquid crystal display device having pleochroic dye and particular relationship of ratio d/po and twist angle
US5646704A (en) * 1989-10-26 1997-07-08 Canon Kabushiki Kaisha Chiral smectic liquid crystal device having predetermined pre-tilt angle and intersection angle
US6094252A (en) * 1995-09-05 2000-07-25 Sharp Kabushiki Kaisha GH LCD having particular parameters and characteristics
WO2000068732A1 (en) * 1999-05-07 2000-11-16 Candescent Intellectual Property Service Display with active contrast enhancement
US6693696B1 (en) 1992-06-30 2004-02-17 Semiconductor Energy Laboratory Co., Ltd. Electro-optical device
US20050140634A1 (en) * 2003-12-26 2005-06-30 Nec Corporation Liquid crystal display device, and method and circuit for driving liquid crystal display device
US20060145978A1 (en) * 2004-12-15 2006-07-06 Nec Corporation Liquid crystal display apparatus, driving method for same, and driving circuit for same
US20130155338A1 (en) * 2010-08-24 2013-06-20 Merck Patent Gesellschaft Mit Beschrankter Haftung Switch element comprising a liquid-crystalline medium
CN111694191A (en) * 2019-03-11 2020-09-22 咸阳彩虹光电科技有限公司 Liquid crystal display and liquid crystal display system

Family Cites Families (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT946051B (en) * 1970-12-04 1973-05-21 Hoffmann La Roche OPTICAL CELL
US3833287A (en) * 1973-03-08 1974-09-03 Bell Telephone Labor Inc Guest-host liquid crystal device
JPS50138851A (en) * 1974-04-24 1975-11-06
JPS5279948A (en) * 1975-12-25 1977-07-05 Sharp Corp Liquid crystal color display device
JPS52108838A (en) * 1976-03-10 1977-09-12 Hitachi Ltd Liquid crystal indicating element
FR2356173A1 (en) * 1976-06-21 1978-01-20 Gen Electric PROCESS FOR IMPROVING THE DESCENT TIME OF A DISPLAY DEVICE COMPOSED OF NEMATIC PROPELLERED LIQUID CRYSTALS
JPS53101296A (en) * 1977-02-16 1978-09-04 Seiko Epson Corp Display unit
CH629001A5 (en) * 1978-02-06 1982-03-31 Ebauches Sa Display unit electro-optical passive.
JPS6019490B2 (en) * 1978-02-28 1985-05-16 シチズン時計株式会社 reflective liquid crystal display device
JPS5525006A (en) * 1978-08-09 1980-02-22 Citizen Watch Co Ltd Liquid crystal display device
US4272162A (en) * 1978-11-21 1981-06-09 Citizen Watch Co., Ltd. Guest-host liquid crystal display device
JPS55127520A (en) * 1979-03-26 1980-10-02 Citizen Watch Co Ltd Liquid crystal display element
JPS55146416A (en) * 1979-05-04 1980-11-14 Hitachi Ltd Liquid crystal display element
JPS56125723A (en) * 1980-03-06 1981-10-02 Seiko Epson Corp Liquid crystal display
JPS56156817A (en) * 1980-05-09 1981-12-03 Hitachi Ltd Liquid-crystal display element
JPS56162722A (en) * 1980-05-21 1981-12-14 Asahi Glass Co Ltd Liquid crystal display device
CH656236A5 (en) * 1980-07-07 1986-06-13 Bbc Brown Boveri & Cie GUEST HOST LIQUID CRYSTAL DISPLAY.
GB2087583B (en) * 1980-10-20 1984-06-06 Western Electric Co Bistable liquid crystal twist cell
JPS57133438A (en) * 1981-02-13 1982-08-18 Hitachi Ltd Liquid crystal display device
DE3126503C2 (en) * 1981-07-04 1983-05-11 Gebrüder Junghans GmbH, 7230 Schramberg Target photo camera
GB2108698B (en) * 1981-10-26 1985-08-21 Secr Defence Liquid crystal displays
JPS58118622A (en) * 1982-01-08 1983-07-14 Asahi Glass Co Ltd Liquid crystal display element
JPS5923328A (en) * 1982-07-29 1984-02-06 Sharp Corp Liquid crystal display device
IN161652B (en) * 1983-07-12 1988-01-09 Bbc Brown Boveri & Cie
JPS6050511A (en) * 1983-08-31 1985-03-20 Hitachi Ltd Liquid crystal display element

Cited By (33)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4786147A (en) * 1984-07-26 1988-11-22 Commissariat A L'energie Atomique Nematic liquid cell weakly doped by a chiral solute and of the type having electrically controlled birefringence
US4729638A (en) * 1984-08-01 1988-03-08 Sharp Kabushiki Kaisha Liquid crystal-type nonglare mirror
US4902105A (en) * 1984-09-19 1990-02-20 U.S. Philips Corporation Liquid crystal display device
US4722594A (en) * 1984-11-14 1988-02-02 Stc Plc Two-dimensional optical information processing apparatus
US4664482A (en) * 1985-03-15 1987-05-12 Hitachi, Ltd. Liquid crystal display device having a chiral additive and angularly displaced polarizers
US4653865A (en) * 1985-04-05 1987-03-31 Hitachi, Ltd. Liquid crystal display device
US4779958A (en) * 1986-06-28 1988-10-25 Kabushiki Kaisha Toshiba Liquid crystal device having different natural and induced twists
US4909605A (en) * 1986-09-12 1990-03-20 Konishiroku Photo Industry Co., Ltd. Liquid crystal display device
US5004324A (en) * 1986-09-12 1991-04-02 Hoffmann-La Roche Inc. Liquid crystal display
US4909603A (en) * 1987-03-14 1990-03-20 Sharp Kabushiki Kaisha Liquid crystal display element
US4941737A (en) * 1987-10-07 1990-07-17 Sharp Kabushiki Kaisha Liquid-crystal display device using twisted nematic liquid crystal molecules
US5646704A (en) * 1989-10-26 1997-07-08 Canon Kabushiki Kaisha Chiral smectic liquid crystal device having predetermined pre-tilt angle and intersection angle
US6693696B1 (en) 1992-06-30 2004-02-17 Semiconductor Energy Laboratory Co., Ltd. Electro-optical device
US7567320B2 (en) 1992-06-30 2009-07-28 Semiconductor Energy Laboratory Co., Ltd. Electro-optical device with liquid crystal
US20040080694A1 (en) * 1992-06-30 2004-04-29 Semiconductor Energy Laboratory Co., Ltd. Electro-optical device
US5463482A (en) * 1993-10-18 1995-10-31 Raychem Corporation Liquid crystal composite with droplets of plural chiral nematic materials with different reflection bands
US5579142A (en) * 1994-10-14 1996-11-26 Sharp Kabushiki Kaisha Liquid crystal display device having pleochroic dye and particular relationship of ratio d/po and twist angle
US6094252A (en) * 1995-09-05 2000-07-25 Sharp Kabushiki Kaisha GH LCD having particular parameters and characteristics
WO2000068732A1 (en) * 1999-05-07 2000-11-16 Candescent Intellectual Property Service Display with active contrast enhancement
US7071907B1 (en) * 1999-05-07 2006-07-04 Candescent Technologies Corporation Display with active contrast enhancement
US20100171818A1 (en) * 2003-12-26 2010-07-08 Nec Corporation Liquid crystal display device, and method and circuit for driving for liquid crystal display device
US20100007637A1 (en) * 2003-12-26 2010-01-14 Nec Corporation Liquid crystal display device, and method and circuit for driving for liquid crystal display device
US20050140634A1 (en) * 2003-12-26 2005-06-30 Nec Corporation Liquid crystal display device, and method and circuit for driving liquid crystal display device
US20100321376A1 (en) * 2003-12-26 2010-12-23 Nec Corporation Liquid crystal display device, and method and circuit for driving liquid crystal display device
US8059117B2 (en) 2003-12-26 2011-11-15 Nec Lcd Technologies, Ltd Liquid crystal display device, and method and circuit for driving liquid crystal display device
US8274465B2 (en) 2003-12-26 2012-09-25 Nlt Technologies, Ltd. Liquid crystal display device, and method and circuit for driving for liquid crystal display device
US8421728B2 (en) 2003-12-26 2013-04-16 Nlt Technologies, Ltd. Liquid crystal display device, and method and circuit for driving for liquid crystal display device
US20060145978A1 (en) * 2004-12-15 2006-07-06 Nec Corporation Liquid crystal display apparatus, driving method for same, and driving circuit for same
US8836621B2 (en) 2004-12-15 2014-09-16 Nlt Technologies, Ltd. Liquid crystal display apparatus, driving method for same, and driving circuit for same
US9495927B2 (en) 2004-12-15 2016-11-15 Nlt Technologies, Ltd. Liquid crystal display apparatus, driving method for same, and driving circuit for same
US20130155338A1 (en) * 2010-08-24 2013-06-20 Merck Patent Gesellschaft Mit Beschrankter Haftung Switch element comprising a liquid-crystalline medium
US9617473B2 (en) * 2010-08-24 2017-04-11 Merck Patent Gmbh Switch element comprising a liquid-crystalline medium
CN111694191A (en) * 2019-03-11 2020-09-22 咸阳彩虹光电科技有限公司 Liquid crystal display and liquid crystal display system

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Publication number Publication date
US4596446A (en) 1986-06-24
US4596446B2 (en) 1997-03-18

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Effective date: 20011211